주요 기술적 인 매개 변수

Electrical parameters	US-020 Ultrasonic Ranging Module
동작전압	DC 5V
동작전류	3mA
작동온도	0 to +70 도
출력모드	GPIO
유도각도	Less than 15 degrees
감지범위	2cm-700cm
감지 정확도	0.3cm +1%

From left to right are numbered 1, 2, 3, 4 . They are defined as follows:

1 Pin : then the VCC the power (DC 5V ).
2 No. Pin : the Trig end connected to an external circuit , a 10uS or more high level input to this pin , trigger module ranging.
3 No. Pin : Echo end connected to an external circuit , when ranging the end, this pin will output a high level, and the level width of the ultrasonic round-trip time.
4 No. PIN : connected to the ground of the external circuitry.
Ranging works